INFOSEC IN BRIEF A computer intrusion hit the US spy satellite agency, but officials insist no classified secrets were lost - just some unclassified ones, apparently. The National Reconnaissance Office (NRO) confirmed to The Register that attackers gained limited access to its networks, but no classified data was exposed. It would not answer whether the attack was linked to the SharePoint vulnerability that was used to break into other government agencies, such as the US National Nuclear Security Administration. "We can confirm that an incident involving our unclassified Acquisition Research Center (ARC) website is currently being investigated in collaboration with federal law enforcement," the agency said. "We do not comment on ongoing investigations." REG AD News of the breach was…